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Slack Technologies IPO

Slack was a business communication platform that provided messaging, file sharing, and collaboration tools for teams and organizations. The company revolutionized workplace communication with its channel-based messaging system and integrations with business applications. It was a major player in the enterprise collaboration software market before being acquired.

AcquiredUpdated April 2, 2026

Key Facts

IndustryEnterprise Communication Software
Founded2009
HeadquartersSan Francisco, CA
Employees~2,500 at acquisition
Websiteslack.com
FundingAcquired by Salesforce for $27.7B in 2021

About Slack Technologies

Slack revolutionized workplace communication by creating a channel-based messaging platform that replaced email for internal team collaboration. The platform organized conversations into channels, enabled file sharing, and integrated with hundreds of third-party applications, becoming the central hub for many companies' digital workflows. Slack's freemium model and viral adoption within organizations helped it grow rapidly from a gaming company pivot to a multi-billion dollar enterprise software leader.

The company went public in 2019 via direct listing and was acquired by Salesforce for $27.7 billion in 2021, one of the largest software acquisitions in history. Slack's success demonstrated the market demand for modern, consumer-grade experiences in enterprise software and sparked widespread adoption of team messaging platforms across organizations of all sizes.

IPO Status

Slack went public through a direct listing on the New York Stock Exchange in June 2019, trading under the ticker WORK. Rather than a traditional IPO, the company chose a direct listing approach that allowed existing shareholders to sell shares without raising new capital. The listing was successful and the stock performed well initially. In December 2020, Salesforce announced its acquisition of Slack for approximately $27.7 billion, which was completed in July 2021. The all-cash and stock deal was one of the largest software acquisitions at the time. Following the acquisition, Slack became part of Salesforce and is no longer traded as a separate public company, though it continues to operate as a product within Salesforce's ecosystem.

Competitors

Frequently Asked Questions

Does Slack Technologies have a stock?

Slack went public through a direct listing in June 2019 but is no longer a standalone public company. Salesforce acquired Slack for $27.7 billion in July 2021.

When is the Slack Technologies IPO date?

Slack already went public in 2019 but was acquired by Salesforce in 2021. There would only be a new IPO if Salesforce decided to spin off Slack as a separate public company in the future.

How can I buy Slack Technologies stock?

You cannot buy Slack stock directly as it was acquired by Salesforce in 2021. To gain exposure to Slack's business, you would need to buy Salesforce stock (CRM) on public exchanges.

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